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How do I implement other kinds of crystals into a crystal radio?Anonymous02/12/18(Mon)17:07:02No.1330735

This is a project I'm really into, as I speculate that different minerals with varied shapes and sizes will achieve many different frequencies [and may be varied consistencies of frequency]. Though I can only speculate as I may be slightly uninformed, sorry about that.

I have shitloads of crystals and many kinds of quartz. I also have slightly magnetic crystals with more boxed, resolved shapes. I truly want to experiment with the many natural shapes of crystals.

Oh and is the cool shapes like this star easy to make up for the radio? Does it compromise anything?

>>1330735>>1330735An effective crystal diode suitable for radio purposes can be fashioned by fermenting an extract from the pineal glands of male adolescent wolverines mixed with an aluminum oxide powder and baked at 2000 degrees until it forms the requisite crystalline structures.

>>1330735Quartz can be used - just not to rectify. was used to provide reference frequencies in higher quality sets during WW2 and afterwards. Quartz oscillators can still be used to do this, and they do allow you to tune a radio with surprising precision, if you can find the correct cleavage plane, cleave and shear out wafers which you can then slice to fit in between a couple precision plates.

rectifier crystals for AM radio typically involve Galena and a point metal contact to provide a primitive diode to rectify a radio signal.

Depending on what "slightly magnetic" crystals you have, you might actually be able to use those for the namesake "crystal".

>>1330735>Oh and is the cool shapes like this star easy to make up for the radio? Does it compromise anything?With that shape ypu will start hearing the devil talm to you over the radio.And the devil is an Asukafag.

>>1335090>crystal is the graphite from the pencilWrong. The pencil was just used instead of a needle, the actual rectifying barrier was the Schottky junction between the needle/pencil and the oxidised razor blade. Since the pencil could be replaced with a needle, we can infer that the needle or graphite acts as the metal and the oxide as the semiconductor crystal in this instance.

>>1330749I wonder if coal coke is amorphous carbon and not graphite, which would explain its semiconductor properties. Amorphous carbon has a negative temperature coefficient, which I think only semiconductors have. Amorphous carbon has to be roasted at high temperatures to turn it into graphite, which Edison had to do to his bamboo filaments to stop them from being susceptible to thermal runaway.